Jumping into the end zone like that often draws a penalty for unsportsmanlike conduct.
If he would have been in open field, it probably would have. I believe that he though that the defenders were going to make a play on him. Heck, I was sitting down there around the 5-10 yard line watching it unfold, and I though the was going to get tackled on the 2 or 3 yard line.. I think it was reasonable (and not unsportsmanlike) to dive for the endzone in that situation..
MO would probably validate your thoughts unless he was hit a little before and knocked out of bounds. Still, the most horrific thing is the possibility that a play like that would be considered unsportsmanlike. THAT has many concerns with many faces...I thought it was close to being a penalty. A TE at full speed with contact by a DB at the 1 yard line is going to end up in the end zone.